OPEN-SOURCE SCRIPT
Williams Variable A/D Pressure [MarkitTick]
💡 This tool reframes Larry Williams' Variable Accumulation/Distribution concept as a fully adaptive, confluence-filtered oscillator, then extends it into a complete ATR-based trade-management layer with a live on-chart dashboard. Rather than reading a single fixed-formula line, traders get a volume-weighted pressure reading that can be reshaped through eight different smoothing engines, gated by a trend-strength filter and a higher-timeframe bias check, and translated directly into projected entry, stop, and take-profit levels the moment a qualifying signal appears.
✨ Originality and Utility
The core value of this script is not the Variable A/D formula itself — that calculation is decades old — but the pipeline built around it. Three distinct engineering layers are stacked with a specific purpose each, which is what justifies combining them into a single publication rather than three separate scripts:
None of these layers is arbitrary window-dressing: the adaptive filter changes what "the trend" looks like, the confluence gate decides whether that trend is tradeable, and the trade-management layer answers the practical question of where to actually place risk once a decision has been made. Removing any one of the three would leave either a raw unfiltered oscillator, an unfiltered signal, or a signal with no execution framework.
🔬 Methodology and Concepts
• Williams Variable Accumulation/Distribution Core
For every bar, a raw pressure value is calculated as the bar's directional efficiency — (close − open) divided by the bar's full range (high − low) — multiplied by that bar's volume. This produces a signed, volume-weighted read of how much of the bar's traded volume pushed price toward its close relative to its open, scaled by how decisively the bar closed within its own range. This raw series is then summed over the WVAD Period using a simple moving average multiplied by the period length, which reconstructs a rolling total (rather than an average) of accumulated buying or selling pressure over that window — consistent with Williams' original "variable" accumulation/distribution concept, where the weighting factor varies bar to bar instead of using a fixed multiplier.
• Adaptive Filter Engine
The rolling WVAD sum is then optionally reshaped by one of eight selectable smoothing methods before it becomes the tool's working "WVAD" line:
Selecting "None" bypasses this stage and the raw WVAD sum is used directly.
• Signal & Confluence Logic
A Signal Length moving average of the (optionally filtered) WVAD line produces the Signal line, and the difference between the two produces the histogram. A raw long or short bias is registered when the WVAD line crosses above or below its Signal line. That raw bias only becomes an active Long/Short signal when both confluence conditions pass: the ADX Filter, when enabled, requires the prior bar's ADX reading to be at or above the ADX Threshold before a crossover is accepted, filtering out signals born in low-trend-strength conditions; the HTF Confirmation filter, when enabled, requires the previous, fully closed candle on the selected higher timeframe to have closed bullish for long signals or bearish for short signals, filtering out crossovers that fight the higher-timeframe bias.
• Confirmation & Non-Repainting Design
The script is built so that no decision depends on data that has not yet closed. The crossover check itself compares the previous bar's WVAD and Signal values, the ADX gate reads the previous bar's confirmed ADX value, and the higher-timeframe request pulls the prior, already-closed candle on that timeframe rather than the currently forming one. Entry price for a new trade plan is likewise taken from the previous bar's close rather than the live price. Entry/exit alerts only fire once a bar is fully confirmed. One practical consequence worth understanding: because the crossover and entry reference both use the prior bar, there is a small, consistent one-bar delay between the moment the underlying pressure line actually crosses its signal and the bar on which the trade plan is drawn and the alert can fire — this is a deliberate confirmation design choice, not an inconsistency. Take-profit and stop-loss "hit" detection, by contrast, is checked against each bar's own intrabar high/low as it happens and can alert in real time, since that behavior simply reports a price touching an already-fixed level rather than altering a prior signal.
🎨 Visual Guide
• Oscillator Pane
• Price Chart Overlay Elements
Several elements are pushed onto the main price chart even though the indicator's native pane is the oscillator below it:
• Trade Level Projection
When a confirmed signal fires (and levels are not locked), five horizontal lines and matching labels are drawn from the signal bar forward: the Stop-Loss line and label, the Entry line and label, and three Take-Profit lines and labels (TP1–TP3). A shaded Risk fill spans the zone between stop and entry, and a shaded Reward fill spans between entry and TP3, giving an immediate visual sense of the risk/reward geometry. All five lines automatically extend to the right as new bars form. Once a take-profit or stop level is touched, its label text updates in place to show a hit confirmation and the resulting percentage gain or loss from entry — the lines are not redrawn or repositioned, only the label text and the ongoing color state update.
• Dashboard Panel
An optional table (position configurable) summarizes, in real time: the symbol and timeframe, whether Lock Signal is active, the current directional Bias, the raw WVAD and Signal values, the Histogram value, a filled-bar Strength readout (WVAD magnitude relative to its own 100-bar high), current Volume and a filled-bar Volume Ratio (versus its 20-bar average), the Higher-Timeframe Bias (only shown when that filter is enabled), the current ADX reading (only shown when the ADX filter is enabled), the active Adaptive Filter name (only shown when one is selected), and the live Trade direction with Entry, SL, and TP1–TP3 prices, each recoloring once its corresponding level has been hit.
📖 How to Use
⚙️ Inputs and Settings
• Core Settings
• Filters
• Trade Tools
• Visuals
• Dashboard
• Alerts
Colors for every line, fill, label, candle state, and dashboard element are independently configurable and are purely cosmetic.
🔍 Deconstruction of the Underlying Scientific and Academic Framework
The foundation is Larry Williams' Variable Accumulation/Distribution concept: a price-volume flow measure in the same family as Chaikin's Accumulation/Distribution Line, but weighting each bar's volume by its own directional efficiency — (close − open)/(high − low) — rather than the Close Location Value used in Chaikin's version, making the "variable" weighting bar-specific rather than fixed.
The adaptive-smoothing stage draws on several established ideas from technical filtering theory: cascaded weighted and volume-weighted averaging (repeated WMA/VWMA passes) as a lag-reduction technique, Alan Hull's reduced-lag moving average construction, and the broader concept of adaptive filters that vary their responsiveness with market conditions rather than using a static weighting scheme — the category popularized by adaptive moving-average research such as Kaufman's work. Within that category, this script's LLAMA and Kalman Filter options are simplified, single-parameter, in-house approximations: LLAMA borrows the linear-extrapolation logic underlying least-squares/regression-adjusted moving averages (projecting a simple average forward using its own recent slope), while the Kalman Filter option implements a single-state recursive estimator in the spirit of Kalman filtering — updating an estimate and its error term each bar based on a fixed process/measurement noise ratio — rather than the multi-state, matrix-based formulation used in full Kalman filter implementations.
The ADX/DMI confluence gate is drawn from Welles Wilder's Directional Movement System, using ADX as a proxy for trend strength independent of direction. The higher-timeframe confirmation gate reflects standard multi-timeframe analysis practice, where aligning a lower-timeframe signal with a higher-timeframe directional read is used to reduce signals that contradict the broader trend. Finally, the ATR-based stop and R-multiple take-profit structure reflects standard volatility-adjusted position and risk management practice, sizing trade levels to each instrument's own recent average range rather than to a fixed point or percentage value.
⚠️ Disclaimer
All provided scripts and indicators are strictly for educational exploration and must not be interpreted as financial advice or a recommendation to execute trades. We expressly disclaim all liability for any financial losses or damages that may result, directly or indirectly, from the reliance on or application of these tools. Market participation carries inherent risk where past performance never guarantees future returns, leaving all investment decisions and due diligence solely at your own discretion.
✨ Originality and Utility
The core value of this script is not the Variable A/D formula itself — that calculation is decades old — but the pipeline built around it. Three distinct engineering layers are stacked with a specific purpose each, which is what justifies combining them into a single publication rather than three separate scripts:
- A selectable adaptive-smoothing stage that lets the trader choose how the raw pressure sum is denoised — from simple averaging to cascaded, lag-reduced, and custom recursive estimators — instead of being locked into one fixed filter shape.
- A dual confluence gate (trend-strength via ADX and directional bias via a higher timeframe) that suppresses crossovers occurring in weak or conflicting conditions, rather than firing on every raw cross of the smoothed line against its signal average.
- An execution layer that converts a confirmed crossover into a concrete, volatility-scaled trade plan (entry, stop, three take-profit tiers) with automatic on-chart tracking of which levels have been touched, plus JSON webhook payloads for each event so the signal can drive external automation without manual re-entry of parameters.
None of these layers is arbitrary window-dressing: the adaptive filter changes what "the trend" looks like, the confluence gate decides whether that trend is tradeable, and the trade-management layer answers the practical question of where to actually place risk once a decision has been made. Removing any one of the three would leave either a raw unfiltered oscillator, an unfiltered signal, or a signal with no execution framework.
🔬 Methodology and Concepts
• Williams Variable Accumulation/Distribution Core
For every bar, a raw pressure value is calculated as the bar's directional efficiency — (close − open) divided by the bar's full range (high − low) — multiplied by that bar's volume. This produces a signed, volume-weighted read of how much of the bar's traded volume pushed price toward its close relative to its open, scaled by how decisively the bar closed within its own range. This raw series is then summed over the WVAD Period using a simple moving average multiplied by the period length, which reconstructs a rolling total (rather than an average) of accumulated buying or selling pressure over that window — consistent with Williams' original "variable" accumulation/distribution concept, where the weighting factor varies bar to bar instead of using a fixed multiplier.
• Adaptive Filter Engine
The rolling WVAD sum is then optionally reshaped by one of eight selectable smoothing methods before it becomes the tool's working "WVAD" line:
- SMA / EMA / RMA — standard simple, exponential, and Wilder-style moving averages applied directly to the WVAD sum.
- Double WMA — a weighted moving average applied to the output of a first weighted moving average, compounding the weighting to reduce lag further than a single WMA pass.
- Triple VWMA — a volume-weighted moving average cascaded through itself three times, so the smoothing itself continues to lean on volume at each stage rather than only at the raw-pressure stage.
- HMA — a Hull Moving Average pass, used here for its reduced-lag response relative to standard averages.
- LLAMA — a proprietary in-house filter unique to this script. It combines a simple moving average of the WVAD sum with a linear extrapolation term: the average per-bar slope of the WVAD sum across the lookback window, scaled by half that window's length, is added back to the moving average. In practice this projects the average forward along its recent trend rather than leaving it lagging behind price the way a plain moving average would.
- Kalman Filter — also a proprietary, simplified single-state implementation rather than a textbook multi-variable Kalman filter. It maintains a running error estimate and a fixed process-noise term equal to the reciprocal of the selected length; on each bar it computes an adaptive gain from the ratio of predicted error to that error plus a fixed measurement-noise constant, then nudges its estimate toward the new WVAD value by that gain. Shorter lengths raise the process-noise term and make the filter react faster to new data; longer lengths make it progressively smoother and slower to adapt.
Selecting "None" bypasses this stage and the raw WVAD sum is used directly.
• Signal & Confluence Logic
A Signal Length moving average of the (optionally filtered) WVAD line produces the Signal line, and the difference between the two produces the histogram. A raw long or short bias is registered when the WVAD line crosses above or below its Signal line. That raw bias only becomes an active Long/Short signal when both confluence conditions pass: the ADX Filter, when enabled, requires the prior bar's ADX reading to be at or above the ADX Threshold before a crossover is accepted, filtering out signals born in low-trend-strength conditions; the HTF Confirmation filter, when enabled, requires the previous, fully closed candle on the selected higher timeframe to have closed bullish for long signals or bearish for short signals, filtering out crossovers that fight the higher-timeframe bias.
• Confirmation & Non-Repainting Design
The script is built so that no decision depends on data that has not yet closed. The crossover check itself compares the previous bar's WVAD and Signal values, the ADX gate reads the previous bar's confirmed ADX value, and the higher-timeframe request pulls the prior, already-closed candle on that timeframe rather than the currently forming one. Entry price for a new trade plan is likewise taken from the previous bar's close rather than the live price. Entry/exit alerts only fire once a bar is fully confirmed. One practical consequence worth understanding: because the crossover and entry reference both use the prior bar, there is a small, consistent one-bar delay between the moment the underlying pressure line actually crosses its signal and the bar on which the trade plan is drawn and the alert can fire — this is a deliberate confirmation design choice, not an inconsistency. Take-profit and stop-loss "hit" detection, by contrast, is checked against each bar's own intrabar high/low as it happens and can alert in real time, since that behavior simply reports a price touching an already-fixed level rather than altering a prior signal.
🎨 Visual Guide
• Oscillator Pane
- The WVAD line plots the (optionally adaptively filtered) pressure sum.
- The Signal line plots its moving average.
- The Histogram, drawn as columns, shows the difference between the two and cycles through four shades: a solid strong color when rising above zero, a faded shade when falling but still above zero, a solid opposite color when falling below zero, and a faded shade when rising but still below zero — giving an at-a-glance read of both direction and momentum change.
- A flat Zero Line marks the neutral pressure boundary.
- BULL and BEAR text markers appear directly on the oscillator at the bar where a confirmed long or short signal registers.
• Price Chart Overlay Elements
Several elements are pushed onto the main price chart even though the indicator's native pane is the oscillator below it:
- Heatmap Candles optionally recolor the actual price candles' bodies, wicks, and borders based on whether the WVAD line is above, below, or equal to its Signal line — turning the price chart itself into a running visual of the underlying bias.
- A second copy of the BULL/BEAR marker is placed directly below or above the corresponding price bar, so the signal is visible on the price chart without needing to also watch the oscillator pane.
• Trade Level Projection
When a confirmed signal fires (and levels are not locked), five horizontal lines and matching labels are drawn from the signal bar forward: the Stop-Loss line and label, the Entry line and label, and three Take-Profit lines and labels (TP1–TP3). A shaded Risk fill spans the zone between stop and entry, and a shaded Reward fill spans between entry and TP3, giving an immediate visual sense of the risk/reward geometry. All five lines automatically extend to the right as new bars form. Once a take-profit or stop level is touched, its label text updates in place to show a hit confirmation and the resulting percentage gain or loss from entry — the lines are not redrawn or repositioned, only the label text and the ongoing color state update.
• Dashboard Panel
An optional table (position configurable) summarizes, in real time: the symbol and timeframe, whether Lock Signal is active, the current directional Bias, the raw WVAD and Signal values, the Histogram value, a filled-bar Strength readout (WVAD magnitude relative to its own 100-bar high), current Volume and a filled-bar Volume Ratio (versus its 20-bar average), the Higher-Timeframe Bias (only shown when that filter is enabled), the current ADX reading (only shown when the ADX filter is enabled), the active Adaptive Filter name (only shown when one is selected), and the live Trade direction with Entry, SL, and TP1–TP3 prices, each recoloring once its corresponding level has been hit.
📖 How to Use
- Treat a WVAD-over-Signal cross, confirmed by a BULL/BEAR marker and matching histogram color flip, as the core directional bias; the heatmap candles offer the fastest visual confirmation of that same bias directly on price.
- Enable the ADX Filter to require a minimum trend-strength reading before a crossover is accepted — useful for avoiding signals generated during flat, low-conviction chop.
- Enable HTF Confirmation and choose a higher timeframe to only accept longs when that timeframe's last closed candle was bullish, and shorts when it was bearish — this narrows signals to those aligned with the broader trend context.
- Use the Adaptive Filter dropdown to trade off responsiveness against smoothness: SMA/EMA/RMA are the most transparent baseline options, Double WMA and Triple VWMA add extra lag reduction (the latter leaning more heavily on volume), HMA targets minimal lag, and LLAMA and Kalman Filter are the script's proprietary adaptive options for traders who want the smoothing itself to react to changing conditions rather than stay fixed.
- Lock Signal freezes the currently displayed trade-level lines and labels so a new opposite signal will not replace them while it is enabled; it does not stop new BULL/BEAR markers, histogram behavior, or alert conditions from continuing to register — it only holds the visual trade plan in place.
- The Entry price used for any trade plan is the previous bar's close, not the live price at the moment the signal appears, so real-world fills will vary from the plotted entry level depending on slippage and gap risk.
- Configure the Alerts group's action-tag fields to match whatever automation system consumes the webhook payloads, then build a TradingView alert on this script using "Any alert() function call" to receive the JSON messages for entries, exits, and each TP/SL event.
⚙️ Inputs and Settings
• Core Settings
- WVAD Period — the summation length for the raw Variable A/D pressure calculation.
- Signal Length — the moving-average length used to derive the Signal line from the (filtered) WVAD line.
• Filters
- Use HTF Confirmation / HTF Timeframe — enables the higher-timeframe directional gate and sets which timeframe it checks.
- Use ADX Filter / ADX Threshold / ADX Length — enables the trend-strength gate and sets its minimum qualifying reading and DMI length.
- Adaptive Filter / Adaptive Filter Length — selects which of the eight smoothing methods (or none) is applied to the WVAD sum, and its lookback length.
• Trade Tools
- Lock Signal — freezes the current trade-level projection against replacement by a new signal, as described above.
- Show Trade Levels — toggles whether entry/SL/TP lines, labels, and fills are drawn at all.
- SL × ATR — sets the stop distance as a multiple of ATR from the entry reference price.
- TP1 × R / TP2 × R / TP3 × R — set each take-profit distance as a multiple of the initial risk (R) defined by the stop distance.
- ATR Length — the lookback used for the ATR value driving stop and target distances.
• Visuals
- Show Histogram, Show WVAD/Signal Lines, Show Signal Markers, Show Zero Line, and Color Candles independently toggle each corresponding chart element described in the Visual Guide.
• Dashboard
- Show Dashboard and Position control whether the summary table is displayed and which corner it occupies.
• Alerts
- Long / Short / Close Long / Close Short Action and TP1 / TP2 / TP3 / SL Hit Action — free-text tags inserted into each event's JSON webhook payload (alongside ticker, timeframe, and relevant price fields) so external automation can route each message correctly.
Colors for every line, fill, label, candle state, and dashboard element are independently configurable and are purely cosmetic.
🔍 Deconstruction of the Underlying Scientific and Academic Framework
The foundation is Larry Williams' Variable Accumulation/Distribution concept: a price-volume flow measure in the same family as Chaikin's Accumulation/Distribution Line, but weighting each bar's volume by its own directional efficiency — (close − open)/(high − low) — rather than the Close Location Value used in Chaikin's version, making the "variable" weighting bar-specific rather than fixed.
The adaptive-smoothing stage draws on several established ideas from technical filtering theory: cascaded weighted and volume-weighted averaging (repeated WMA/VWMA passes) as a lag-reduction technique, Alan Hull's reduced-lag moving average construction, and the broader concept of adaptive filters that vary their responsiveness with market conditions rather than using a static weighting scheme — the category popularized by adaptive moving-average research such as Kaufman's work. Within that category, this script's LLAMA and Kalman Filter options are simplified, single-parameter, in-house approximations: LLAMA borrows the linear-extrapolation logic underlying least-squares/regression-adjusted moving averages (projecting a simple average forward using its own recent slope), while the Kalman Filter option implements a single-state recursive estimator in the spirit of Kalman filtering — updating an estimate and its error term each bar based on a fixed process/measurement noise ratio — rather than the multi-state, matrix-based formulation used in full Kalman filter implementations.
The ADX/DMI confluence gate is drawn from Welles Wilder's Directional Movement System, using ADX as a proxy for trend strength independent of direction. The higher-timeframe confirmation gate reflects standard multi-timeframe analysis practice, where aligning a lower-timeframe signal with a higher-timeframe directional read is used to reduce signals that contradict the broader trend. Finally, the ATR-based stop and R-multiple take-profit structure reflects standard volatility-adjusted position and risk management practice, sizing trade levels to each instrument's own recent average range rather than to a fixed point or percentage value.
⚠️ Disclaimer
All provided scripts and indicators are strictly for educational exploration and must not be interpreted as financial advice or a recommendation to execute trades. We expressly disclaim all liability for any financial losses or damages that may result, directly or indirectly, from the reliance on or application of these tools. Market participation carries inherent risk where past performance never guarantees future returns, leaving all investment decisions and due diligence solely at your own discretion.
開源腳本
秉持TradingView一貫精神，這個腳本的創作者將其設為開源，以便交易者檢視並驗證其功能。向作者致敬！您可以免費使用此腳本，但請注意，重新發佈代碼需遵守我們的社群規範。
💡 Proprietary indicators. Original research. Built by analysts who trade.
📢 Free Telegram: t.me/MarkitTick_Updates
👑 Premium: markittick.com
📢 Free Telegram: t.me/MarkitTick_Updates
👑 Premium: markittick.com
免責聲明
這些資訊和出版物並非旨在提供，也不構成TradingView提供或認可的任何形式的財務、投資、交易或其他類型的建議或推薦。請閱讀使用條款以了解更多資訊。
開源腳本
秉持TradingView一貫精神，這個腳本的創作者將其設為開源，以便交易者檢視並驗證其功能。向作者致敬！您可以免費使用此腳本，但請注意，重新發佈代碼需遵守我們的社群規範。
💡 Proprietary indicators. Original research. Built by analysts who trade.
📢 Free Telegram: t.me/MarkitTick_Updates
👑 Premium: markittick.com
📢 Free Telegram: t.me/MarkitTick_Updates
👑 Premium: markittick.com
免責聲明
這些資訊和出版物並非旨在提供，也不構成TradingView提供或認可的任何形式的財務、投資、交易或其他類型的建議或推薦。請閱讀使用條款以了解更多資訊。